Commit db581879 authored by Bart Samwel's avatar Bart Samwel Committed by Linus Torvalds

[PATCH] Config file for laptop mode.

From: Dax Kelson <dax@gurulabs.com>

Add support for a external configuration file for /sbin/laptop_mode, and
/etc/acpi/actions/battery.sh.  Convert battery.sh to use CPUFreq (off by
default) instead of CPU throttling (that was off by default).

Cleanup some formating for 80 columns. 

All changes were written by me on a plane flight from Philadelphia to Salt
Lake City on July 9th.  :)

(Note from Bart Samwel: was submitted to Linus earlier, this patch is
unchanged from that.  I needed to submit this into -mm for now because my
other changes are dependent on Dax's changes.)
Signed-off-by: default avatarBart Samwel <bart@samwel.tk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 8925fdb3
......@@ -3,7 +3,7 @@ How to conserve battery power using laptop-mode
Document Author: Bart Samwel (bart@samwel.tk)
Date created: January 2, 2004
Last modified: April 3, 2004
Last modified: July 10, 2004
Introduction
------------
......@@ -158,13 +158,89 @@ Tips & Tricks
(http://noflushd.sourceforge.net/), it seems that noflushd prevents laptop-mode
from doing its thing.
Configuration file for control and ACPI battery scripts
--------------
This allows the tunables to be changed for the scripts via an external
configuration file
It should be installed as /etc/default/laptop-mode on Debian, and as
/etc/sysconfig/laptop-mode on Red Hat, SUSE, Mandrake, and other work-alikes.
--------------------CONFIG FILE BEGIN-------------------------------------------
# Maximum time, in seconds, of hard drive spindown time that you are
# confortable with. Worst case, it's possible that you could lose this
# amount of work if your battery fails you while in laptop mode.
MAX_AGE=600
# Read-ahead, in kilobytes. You can spin down the disk while playing MP3/OGG, by
# setting the disk readahead to 8MB (READAHEAD=16384). Effectively, the disk
# will read a complete MP3 at once, and will then spin down while the MP3/OGG is
# playing.
READAHEAD=4096
# Shall we remount journaled fs. with appropiate commit interval? (1=yes)
DO_REMOUNTS=1
# And shall we add the "noatime" option to that as well? (1=yes)
DO_REMOUNT_NOATIME=1
# Dirty synchronous ratio. At this percentage of dirty pages the process
# which
# calls write() does its own writeback
DIRTY_RATIO=40
#
# Allowed dirty background ratio, in percent. Once DIRTY_RATIO has been
# exceeded, the kernel will wake pdflush which will then reduce the amount
# of dirty memory to dirty_background_ratio. Set this nice and low, so once
# some writeout has commenced, we do a lot of it.
#
DIRTY_BACKGROUND_RATIO=5
# kernel default dirty buffer age
DEF_AGE=30
DEF_UPDATE=5
DEF_DIRTY_BACKGROUND_RATIO=10
DEF_DIRTY_RATIO=40
DEF_XFS_AGE_BUFFER=15
DEF_XFS_SYNC_INTERVAL=30
DEF_XFS_BUFD_INTERVAL=1
# This must be adjusted manually to the value of HZ in the running kernel
# on 2.4, until the XFS people change their 2.4 external interfaces to work in
# centisecs. This can be automated, but it's a work in progress that still
# needs# some fixes. On 2.6 kernels, XFS uses USER_HZ instead of HZ for
# external
# interfaces, and that is currently always set to 100. So you don't need to
# change this on 2.6.
XFS_HZ=100
# Should the maximum CPU frequency be adjusted down while on battery?
# Requires CPUFreq to be setup.
# See Documentation/cpu-freq/user-guide.txt for more info
CPU_MANAGE=no
# When on battery what is the maximum CPU speed that the system should
# use? Legal values are "slowest" for the slowest speed that your
# CPU is able to operate at, or a value listed in:
# /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
# Only applicable if CPU_MANAGE=yes
CPU_MAXFREQ=slowest
# Spindown time for your hard drive (man hdparm for valid values)
# I prefer 2 hours on AC and 20 seconds for battery
AC_HD=244
BATT_HD=4
--------------------CONFIG FILE END---------------------------------------------
Control script
--------------
Please note that this control script works for the Linux 2.4 and 2.6 series.
--------------------CONTROL SCRIPT BEGIN------------------------------------------
--------------------CONTROL SCRIPT BEGIN----------------------------------------
#!/bin/bash
# start or stop laptop_mode, best run by a power management daemon when
......@@ -183,21 +259,35 @@ Please note that this control script works for the Linux 2.4 and 2.6 series.
#############################################################################
# Age time, in seconds. should be put into a sysconfig file
MAX_AGE=600
# Source config
if [ -f /etc/default/laptop-mode ] ; then
# Debian
. /etc/default/laptop-mode
elif [ -f /etc/sysconfig/laptop-mode ] ; then
# Others
. /etc/sysconfig/laptop-mode
fi
# Don't raise an error if the config file is incomplete
# set defaults instead:
# Maximum time, in seconds, of hard drive spindown time that you are
# confortable with. Worst case, it's possible that you could lose this
# amount of work if your battery fails you while in laptop mode.
MAX_AGE=${MAX_AGE:-'600'}
# Read-ahead, in kilobytes
READAHEAD=4096
READAHEAD=${READAHEAD:-'4096'}
# Shall we remount journaled fs. with appropiate commit interval? (1=yes)
DO_REMOUNTS=1
DO_REMOUNTS=${DO_REMOUNTS:-'1'}
# And shall we add the "noatime" option to that as well? (1=yes)
DO_REMOUNT_NOATIME=1
DO_REMOUNT_NOATIME=${DO_REMOUNT_NOATIME:-'1'}
# Dirty synchronous ratio. At this percentage of dirty pages the process which
# calls write() does its own writeback
DIRTY_RATIO=40
DIRTY_RATIO=${DIRTY_RATIO:-'40'}
#
# Allowed dirty background ratio, in percent. Once DIRTY_RATIO has been
......@@ -205,16 +295,16 @@ DIRTY_RATIO=40
# of dirty memory to dirty_background_ratio. Set this nice and low, so once
# some writeout has commenced, we do a lot of it.
#
DIRTY_BACKGROUND_RATIO=5
DIRTY_BACKGROUND_RATIO=${DIRTY_BACKGROUND_RATIO:-'5'}
# kernel default dirty buffer age
DEF_AGE=30
DEF_UPDATE=5
DEF_DIRTY_BACKGROUND_RATIO=10
DEF_DIRTY_RATIO=40
DEF_XFS_AGE_BUFFER=15
DEF_XFS_SYNC_INTERVAL=30
DEF_XFS_BUFD_INTERVAL=1
DEF_AGE=${DEF_AGE:-'30'}
DEF_UPDATE=${DEF_UPDATE:-'5'}
DEF_DIRTY_BACKGROUND_RATIO=${DEF_DIRTY_BACKGROUND_RATIO:-'10'}
DEF_DIRTY_RATIO=${DEF_DIRTY_RATIO:-'40'}
DEF_XFS_AGE_BUFFER=${DEF_XFS_AGE_BUFFER:-'15'}
DEF_XFS_SYNC_INTERVAL=${DEF_XFS_SYNC_INTERVAL:-'30'}
DEF_XFS_BUFD_INTERVAL=${DEF_XFS_BUFD_INTERVAL:-'1'}
# This must be adjusted manually to the value of HZ in the running kernel
# on 2.4, until the XFS people change their 2.4 external interfaces to work in
......@@ -222,7 +312,7 @@ DEF_XFS_BUFD_INTERVAL=1
# some fixes. On 2.6 kernels, XFS uses USER_HZ instead of HZ for external
# interfaces, and that is currently always set to 100. So you don't need to
# change this on 2.6.
XFS_HZ=100
XFS_HZ=${XFS_HZ:-'100'}
#############################################################################
......@@ -466,7 +556,7 @@ case "$1" in
esac
exit 0
--------------------CONTROL SCRIPT END--------------------------------------------
--------------------CONTROL SCRIPT END------------------------------------------
ACPI integration
......@@ -475,22 +565,34 @@ ACPI integration
Dax Kelson submitted this so that the ACPI acpid daemon will
kick off the laptop_mode script and run hdparm.
---------------------------/etc/acpi/events/ac_adapter BEGIN-------------------------------------------
-----------------/etc/acpi/events/ac_adapter BEGIN------------------------------
event=ac_adapter
action=/etc/acpi/actions/battery.sh
---------------------------/etc/acpi/events/ac_adapter END-------------------------------------------
----------------/etc/acpi/events/ac_adapter END---------------------------------
----------------/etc/acpi/actions/battery.sh BEGIN------------------------------
#!/bin/bash
---------------------------/etc/acpi/actions/battery.sh BEGIN-------------------------------------------
#!/bin/sh
# Source config
if [ -f /etc/default/laptop-mode ] ; then
# Debian
. /etc/default/laptop-mode
elif [ -f /etc/sysconfig/laptop-mode ] ; then
# Others
. /etc/sysconfig/laptop-mode
fi
# Don't raise an error if the config file is incomplete
# set defaults instead:
# cpu throttling
# cat /proc/acpi/processor/CPU0/throttling for more info
ACAD_THR=0
BATT_THR=2
# cpu frequency scaling
# See Documentation/cpu-freq/user-guide.txt for more info
CPU_MANAGE=${CPU_MANAGE:-'no'}
CPU_MAXFREQ=${CPU_MAXFREQ:-'slowest'}
# spindown time for HD (man hdparm for valid values)
# I prefer 2 hours for acad and 20 seconds for batt
ACAD_HD=244
# I prefer 2 hours on AC and 20 seconds for battery
AC_HD=244
BATT_HD=4
# ac/battery event handler
......@@ -501,9 +603,11 @@ case $status in
"on-line")
echo "Setting HD spindown for AC mode."
/sbin/laptop_mode stop
/sbin/hdparm -S $ACAD_HD /dev/hda > /dev/null 2>&1
/sbin/hdparm -S $AC_HD /dev/hda > /dev/null 2>&1
/sbin/hdparm -B 255 /dev/hda > /dev/null 2>&1
#echo -n $ACAD_CPU:$ACAD_THR > /proc/acpi/processor/CPU0/limit
if [ $CPU_MANAGE = 'yes' ]; then
echo `cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq` > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
fi
exit 0
;;
"off-line")
......@@ -511,11 +615,16 @@ case $status in
/sbin/laptop_mode start
/sbin/hdparm -S $BATT_HD /dev/hda > /dev/null 2>&1
/sbin/hdparm -B 1 /dev/hda > /dev/null 2>&1
#echo -n $BATT_CPU:$BATT_THR > /proc/acpi/processor/CPU0/limit
if [ $CPU_MANAGE = 'yes' -a -e /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq ]; then
if [ $CPU_MAXFREQ = 'slowest' ]; then
CPU_MAXFREQ=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
fi
echo $CPU_MAXFREQ > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
fi
exit 0
;;
esac
---------------------------/etc/acpi/actions/battery.sh END-------------------------------------------
---------------------------/etc/acpi/actions/battery.sh END---------------------
Monitoring tool
---------------
......@@ -523,7 +632,7 @@ Monitoring tool
Bartek Kania submitted this, it can be used to measure how much time your disk
spends spun up/down.
---------------------------dslm.c BEGIN-------------------------------------------
---------------------------dslm.c BEGIN-----------------------------------------
/*
* Simple Disk Sleep Monitor
* by Bartek Kania
......@@ -689,4 +798,4 @@ int main(int ac, char **av)
return 0;
}
---------------------------dslm.c END---------------------------------------------
---------------------------dslm.c END-------------------------------------------
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